mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
67fdd7eded
Embedders can now notify shell during startup about the various displays and their corresponding settings. Adds a notion of Display update type which can later include chages to displays during runtime such as addition / removal / reconfiguration of displays. We also remove the responsibility of providing the refresh rate from `vsync_waiter` to `DisplayManager`. Rewires existing platform implementations of the said API to use `Shell::OnDisplayUpdate` to notify the display manager of the startup configuration. DisplayManager is also thread-safe to account for rasterizer and UI thread accesses.
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "flutter/shell/common/display_manager.h"
|
|
|
|
#include "flutter/fml/logging.h"
|
|
#include "flutter/fml/macros.h"
|
|
|
|
namespace flutter {
|
|
|
|
DisplayManager::DisplayManager() = default;
|
|
|
|
DisplayManager::~DisplayManager() = default;
|
|
|
|
double DisplayManager::GetMainDisplayRefreshRate() const {
|
|
std::scoped_lock lock(displays_mutex_);
|
|
if (displays_.empty()) {
|
|
return kUnknownDisplayRefreshRate;
|
|
} else {
|
|
return displays_[0].GetRefreshRate();
|
|
}
|
|
}
|
|
|
|
void DisplayManager::HandleDisplayUpdates(DisplayUpdateType update_type,
|
|
std::vector<Display> displays) {
|
|
std::scoped_lock lock(displays_mutex_);
|
|
CheckDisplayConfiguration(displays);
|
|
switch (update_type) {
|
|
case DisplayUpdateType::kStartup:
|
|
FML_CHECK(displays_.empty());
|
|
displays_ = displays;
|
|
return;
|
|
default:
|
|
FML_CHECK(false) << "Unknown DisplayUpdateType.";
|
|
}
|
|
}
|
|
|
|
void DisplayManager::CheckDisplayConfiguration(
|
|
std::vector<Display> displays) const {
|
|
FML_CHECK(!displays.empty());
|
|
if (displays.size() > 1) {
|
|
for (auto& display : displays) {
|
|
FML_CHECK(display.GetDisplayId().has_value());
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace flutter
|